Water-gage for steam-boilers.



M. F. SCALLEY.

WATER GAGE FOR STEAM BOILERS APPLICATION FILED APRHZZ, 1912,

Patented June 3, 1913.

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M. F. SCALLEY.

WATER GAGE FOR STEAM BOILERS.

APPLICATION FILED 11.22, 1012.

Patented June 3, 1913.

'2 SHEETS-BEBE! 2.

MICHAEL F. SCALLEY, 0F MIDDLETOWN, NEW YORK.

WATER-GAGE FOR STEAM-BOILERS.

Specification of Letters Patent.

Patented June 3, 1913.

Application filed April 22, 1912. Serial No. 692,285.

To all whom it may concern:

Be it known that I, MICHAEL F. SCALLEY, a citizen of the United States, residing at Middletown, in the county of Orange and State of New .York, have invented certain new and useful Improvements in \Vater Gages for Steam-Boilers, of which the following is a s ecification.

W'h1le app icable to steam generators generally, my improved water gage is designed more particularly'for use where excessive internal pressure has to be sustained, and also where the water gage is liable to be subjected to vibration, jar and strain, as for instance when used in connection with locomotive boilers.

The object is to afford a simple but sub stant-ial and effective structure, that will not only visually record the water level with clearness and accuracy, but which may also be quickly and conveniently taken apart for the replacement or substitution of a sightglass without resort to specially skilled labor, or the removal of the device to a repair or machine shop, -an ordinary nut or bolt wrench being all the implement required to effect the disjunction and assemblage of the parts.

The invention consists in the specific con struction and arrangement of parts described and claimed, a distinguishing feature being the provision of a longitudinally and centrally slotted intermediate channel plate on which the sight glasses are seated, in conjunction with front and rear cap plates coincidently slotted, these three longitudinally slotted plates being bound together by suitable means, and the slot in the intermediate plate taken in conjunction with the adjacent inner sides of the sight glasses, constituting the water and steam gage space, all as hereinafter more fully setforth.

In the accompanying drawings, Figure 1, is a front elevation of my improved water gage; Fig. 2, a rear view of the same; Fig. 3, a side elevation, partly in sectional elevation; Fig. 4, is a central vertical longitudinal section on plane of line 4-4 Figs. 1 and 2; Fig. 5, is a top view of the gage; Fig. 6, a view of the bottom thereof; Fig. 7, is a front elevation showing the use of a protective screen; Fig. 8, is a transverse section upon plane of line 88 Figs. 1, 2 and 3; Fig. 9, 1s a transverse section taken upon plane of line 99 Figs. 1, 2 and 3, the post-bolts being shown in elevation; Fig. 10, is'an elevation of the rear side of the front cap plate; Fig. 11, a side elevation thereof, with the post-bolts in position; Fig. 12, is a top view of Fig. 11;F1g. 13, is an elevation of either side of the intermediate channel plate; Fig. 14, is a longitudinal section thereof, taken upon zig-zag line 14-14 Fig. 13; Fig. 15, is a transverse section taken upon plane of line 1515, Fig. 13; Fig. 16, is a transverse section of a sight glass. Fig. 17, shows opposite side elevations of a sight glass; Fig. 18, is an elevation, broken away centrally, of the inner side of the rear cap plat/e; Fig. 19, represents elevations of the form of gaskets used.

The intermediate channel plate A, is formed with two longitudinal rectangular recesses a, a, one on each side of the central web a, and in these rece sses the inner sides and edges g, g, of the sight glasses G, G, are seated. The web a, is formed with the central longitudinal slot 0,, communicating through inlet passages a 09, respectively with the tapped sockets a, a", for engagement with suitable connection pipes (not shownl by which communication is established with the boiler above and below the normal water line, as in all gages of this class.

The inner side of each sight glass G, is preferably formed with a groove 9', corresponding to and coinciding with the longitudinal slot a, in the web a, of the intermediate plate A, and constituting therewith the gage channel within which the column of water rises or falls. as the case may be, to indicate the level of water in the boiler. Gaskets Z, J, of suitable material, interposed between and shaped to fit the web a, and inner sides g g, of the sight glasses G. G, seal the channel (1*, g, g.

The inner side of the front cap plate B, is

formed with screw tapped sockets 6 V, for r the reception of the threaded ends 0, p, of the stud posts P, P, the bodies of which are I rectangular in cross section and of sufiicient widthto ad'mit of the formation therein of a key-slot p, near the outer extremity of each post, as clearly shown in Fig. 12, These stud-posts P, P, when screwed, in position on the inner side of .the front cap plate B, become essentially an integral part. thereof, and form a means of assembling and holding all the parts in perfect alinement. For this purpose the intermediate channel plate'A, and the back cap plate C, are formed each with post-holes or recesses a", a and 0, c, respectively,such holes be ing of practically the same size and shape as the cross section of the stud-posts P, P, so that the latter may be readily passed through said holes in either applying or removingthe intermediate plate A, or the back cap plate C.

The rear cap platevC, is formed with the longitudinal socket or recess 0', having the central longitudinal slot 0 A sight glass G, is inserted in this recess 0, a gasket d, being interposed between it and the bottom of the recess, as in the case of the front cap plate B; and in like manner the outer edges of the slot 0 are flared or curved for light and observation. The rear side of the back cap plate C, is also formed with longitudinal key grooves 0 0 (see 8.) for the reception of the inner edges of the wedge shaped keys K, k, which pass through the recesses 71', p, in the protruding ends of the stud-posts P, P. The lower ends of these keys are screw=threaded and pass through holes partly in the lugs 0 c", on the lower extremity of the backcap plate C, where they are secured by nuts k, r, by which means the several plates B, C, A, may be firmly pressed together to render the device water and steam tight. IV hen thus securely tightened and rendered leak-proof, the parts are finally and positively l'oc ed together by screw bolts'E, E, passing through two of the plates and engaging screw threads tapped in the third. As shown in the draw ings, and by preference, the innerside of the front cap-plate B, is formed with screw tapped holes b 6 for the reception of the threaded ends of the bolts E, E, the shanks of the latter passing through holes 0*, e and a", a", formed respectively in the back cap I plate C, and the intermediate channel plate A. By the removal of these lock bolts E, E, and the nuts 7c, is, it is obvious that the parts may be readily separated after the withdrawal of the key-s K, K, the stud-posts P, P, being free to pass through the re cesses a and c, in the intern'iediate channel plate A, and the back cap plate C. In other words, the securing means are readily and conveniently detachable to give access to the 1 interior for any pin-pose desired, as for cleaning, substitution of parts, renewal of gaskets, 8m.

If desired a float 7', may be inclosed within the channel for the purpose of more readily distinguishing the water level therein,

In order to guard against danger of flying particles in case of the rupture of the front sight glass, the front cap plate is provided with a framed screen Fi, mounted on the cap plate by means which will admit of the raising of the screen when desired. Thus in Fig. 7, of the drawings the frame of the screen is shown resting in recessed lugs on the face of the front cap plate.

The studs P, may be provided with additional key openings 11, for the temporary reception of key pins to hold the intermediatecenter plate in position during the assembling of the parts.

l Vhat 1 claim as my invention and desire to secure by Letters Patent is,

1. In a gage of the character designated, the combination of the front cap plate formed with a longitudinal sight opening and with screw-tapped sockets on its inner side, stud posts the bodies of which are angular in cross section and which are formed with threaded inner ends engaging the said screw tapped sockets in the front cap plate, whereby the stud posts are rigidly secured thereto as a base, said stud posts be- ,i'ng also formed near their outer ends with key slots, an intermediate channel plate recessed to fit over said stud posts and formed with end inlet passages and tapped pipe sockets, sightglasses sea-ted upon either side of said intermediate channel plate, a rear cap plate recessed to fit over said stud posts and formed with a longitudinal sight slot, wedge shaped keys fitting in the key slots in the protruding end of the stud posts, and means for securing the said wedge shaped keys in position, as and for the purpose set forth.

2. In a gage of the character designated, the combination of the front cap plate formed with a longitudinal sight opening and with screw-tapped sockets on its inner side, stud posts the bodies of which are angular in cross section and which are formed with threaded inner ends engaging the said screw-tapped sockets in the front, cap plate, whereby the stud posts are rigidly secured thereto as a base, said stud posts being also formed near their outer ends with key slots, an intermediate channel plate recessed to fit over said stud posts and formed with end inlet passages and tapped pipe sockets, sight glasses seated upon either side of said intermediate channel plate, a rear cap plate recessed to fit over said stud posts and vformed with a longitudinal sight slot,

wedge shaped keys fitting in the key slots 1 the protruding ends of the stud posts ties of the keys and bearing against the plate, as and for the purpose;

said rear cap set forth.

, 3. In a gage of the char: icter. designated,-

the combination of the front cap plate formed with a longitudinal sight opening and with screw-tapped sockets on its inner side, stud, poststhe bodies of which are angular in cross section and which are formed with threaded inner ends engaging the said screw tapped sockets in the front cap plate, whereby the stud, posts are rigidly secured thereto; as a base, said stud posts being also ofined near their outer ends with key slots, an intermediate channel plate recessed to fit over said 5 tud posts and formed with end inlet passagus and tapped pipe sockets, sight glasses seated upon either side of said intermediate channel plate, a rear cap plate recessed to fit over said stud posts, and formed with a longitudinal sight slot, and also with longitudinal key grooves on its outer surface, wedge shaped keys fitting in said ongitudinal grooves in the rear cap plate and in the key slots in the protruding ends of the stud posts, said wedge shaped keys being formed with threaded extremities, and screw nuts engaging said threaded extremities of the wedge shaped keys and bearing against the rear cap plate, as and for the purpose set forth.

' 4. In a gage of the character dusignated, the combination of the front cap plate formed with a longitudinal sight opening and with screw-tapped socketson its inner side, stud posts the bodies of which are an gular in c'ross section andwhich are formed with threaded inner ends engaging the said screw ta'pped sockets in the front cap plate, whereby the stud posts are rigidly secured thereto as a base, said stud posts being also formed near their outer ends with key slots, an intermediate channel plat-e recessecl to fit over said stud posts and formed with end inlet passages and tapped pipe sockets, sight Copies of this patent may be obtained for glasses seated upon either side of said intermediate channel plate, a rear-cap plate recessed to fit over said stud posts, and formed with a longitudinal sight slot, and also with longitudinal key grooves on its outer surface, wedge shaped keys fitting in said longitudinal grooves in the rear cap plate and in the key slots in the protruding ends of the stud posts, said wedge shaped keys being formed with threaded extremities, screw nuts engaging said threaded extremities of the wedge shaped keys and bearing against the rear cap plate, and locking screw bolts passing through holes formed fortheir reception in the rear cap plate and the intermediate plate and screwing into threaded holes formed for the purpose in the innerf side of the front cap plate, as-and for'the' purpose set forth.

5. In a gage of the character designated, the combination of the front, cap plate formed with a longitudinal sight opening and with screw-tapped sockets on its. inner side, stud posts the bodies of which are angular in cross section and which are formed with threaded inner ends engaging the said screw tapped sockets in the front cap plate, whereby the stud posts are rigidly secured thereto as a base, said stud posts being also formed near their outer ends with key slots, an intermediate channel plate recessed to fit over said stud posts and formed with recessed to fit [over said stud posts and formed with a longitudinal sightslot',-wedge shaped keys fitting in the key slots in the protruding ends of the stud post's, means position, and a framed safety screen removably supported on recessed lugs on the front cap plate, as and for the purpose set for securing the said wedge-shaped keys in five cents each, by addressing the Commissioner of I'atentt. Washington. D. C." 

